Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Maine
|Name||Precambrian Z rocks of Islesboro limestone|
|Original map label||Zil|
|Comments||Islesboro Formation is of Late Proterozoic age. Consists of interbedded pelite, siltstone and sandstone, limestone and dolomite, conglomerate, rhyolite, and basalt. D.B. Stewart (1990, oral commun.) considers Islesboro to be distal facies of North Haven Greenstone, Ellsworth Schist and schist at Columbia Falls (eastern coastal ME). (ME072) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies AA - Low rank amphibolite facies Protolith N - Limestone and/or dolostone|
|Primary rock type||limestone|
|Secondary rock type||dolostone (dolomite)|
|Other rock types|
Sedimentary > Carbonate > DolostoneGS - Greenschist facies AA - Low rank amphibolite facies Protolith N - Limestone and/or dolostone
Sedimentary > Carbonate > LimestoneGS - Greenschist facies AA - Low rank amphibolite facies Protolith N - Limestone and/or dolostone
Digital bedrock data downloaded from Maine Office of GIS in September 2005 from http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock Bedrock units table (publication date 11/15/2002) downloaded from same site. Permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006.
Osberg, P. H., Hussey, A.M., and Boone, G. M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.
|Geographic coverage||Knox - Waldo|
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